Also known as: 海馬モクバ, モクバ
Younger brother of Kaiba Seto in Yu-Gi-Oh! Duel Monsters. He and Seto were adopted by Gozaburo Kaiba from an orphanage.
Mokuba has a long history of being kidnapped and abused by Seto's enemies, resulting in Seto always having to come to his rescue.